Seasonal Dynamics of Skrjabinoptera phrynosoma (Nematoda) Infection in Horned Lizards From the Alvord Basin: Temporal Components of a Unique Life Cycle

2011 ◽  
Vol 97 (4) ◽  
pp. 559-564 ◽  
Author(s):  
K. Claire Hilsinger ◽  
Roger A. Anderson ◽  
Dana Nayduch
Keyword(s):  
Life Cycle ◽  
Seasonal Dynamics ◽  
Horned Lizards ◽  
Alvord Basin

Seasonal Dynamics and Microhabitat Distribution ofUrastoma cyprinaeinMytilus galloprovincialis: Implications for Its Life Cycle

2010 ◽  
Vol 29 (1) ◽  
pp. 187-192 ◽  
Author(s):  
Celia Crespo-González ◽  
Helena Rodríguez-Domínguez ◽  
Paula Segade ◽  
Raúl Iglesias ◽  
Cristina Arias ◽  
...  
Keyword(s):  
Life Cycle ◽  
Seasonal Dynamics ◽  
Microhabitat Distribution

Seasonal dynamics and life cycle of Heterotrissocladius marcidus (Diptera: Chironomidae) in high altitude lakes (High Tatra Mts, Slovakia)

Biologia ◽  
2015 ◽  
Vol 70 (7) ◽  
Author(s):  
Katarína Goffová ◽  
Peter Bitušík ◽  
Zuzana Čiamporová-Zatóvičová ◽  
Dana Bukvová ◽  
Ladislav Hamerlík
Keyword(s):  
Life Cycle ◽  
Seasonal Dynamics ◽  
Seasonal Changes ◽  
Alpine Lakes ◽  
Early Summer ◽  
Larval Abundance ◽  
Tatra Mountains ◽  
Tatra Mts ◽  
Summer Decline ◽  
High Tatra Mountains

AbstractWe estimated the seasonal dynamics and life cycle of the chironomid Heterotrissocladius marcidus (Walker, 1856) in three alpine lakes in the High Tatra Mountains (Central Europe). H. marcidus had univoltine cycle in all lakes surveyed and seasonal changes of density showed an early summer and an autumn peak interrupted by a mid-summer decline of larval abundance. Our results indicate that phenology of H. marcidus is sensitive to thermal regime and local differences in lake water temperature can lead to differences of the life history within the same population

Study of the Seasonal Dynamics, Life Cycle, and Host Specificity ofAmblyomma aureolatum(Acari: Ixodidae)

2004 ◽  
Vol 41 (3) ◽  
pp. 324-332 ◽  
Author(s):  
Adriano Pinter ◽  
Ricardo A. Dias ◽  
Solange M. Gennari ◽  
Marcelo B. Labruna
Keyword(s):  
Life Cycle ◽  
Host Specificity ◽  
Seasonal Dynamics

Seasonal dynamics and ecological strategies of the pitcher plant chironomid, Metriocnemus knabi Coq. (Diptera: Chironomidae), in southeast New Brunswick

1982 ◽  
Vol 60 (12) ◽  
pp. 3075-3083 ◽  
Author(s):  
C. G. Paterson ◽  
C. J. Cameron
Keyword(s):  
Life Cycle ◽  
New Brunswick ◽  
Seasonal Dynamics ◽  
Seasonal Pattern ◽  
Sarracenia Purpurea ◽  
Ecological Strategies ◽  
Seasonal Fluctuations ◽  
Pitcher Plant ◽  
Metriocnemus Knabi ◽  
Summer Growth

In southeast New Brunswick the chironomid, Metriocnemus knabi, an inhabitant of the aquatic system contained within the leaves of the pitcher plant, Sarracenia purpurea, show seasonal fluctuations in numbers related to emergence and colonization, but density is usually correlated with the potential volume of the leaves. Females from a May emergence oviposit into overwintered leaves and produce a generation which emerges in August prior to the deterioration of the leaves. The progeny of the August emergence develop in leaves of the current summer growth and do not emerge until the following July. Ovipositing by this generation can be into overwintered or newly opened leaves. Larvae that begin development in overwintered leaves, which show progressive deterioration during the later summer and autumn, migrate to younger leaves that have not achieved complete colonization. The July emergence produces the generation which emerges the following May. Thus, there appears to be two cohorts in the population, each of which produces three generations every 2 years. This unusual life cycle tends towards maximizing use of the living habitat which also has a seasonal pattern of growth and senescence.

Ultrastructural analysis of “Sensory” surface nerve endings and “putative” neurotransmitter sites in Schistosoma mansoni Miracidia

1989 ◽  
Vol 47 ◽  
pp. 962-963
Author(s):  
Betty Ruth Jones ◽  
Steve Chi-Tang Pan
Keyword(s):  
Nervous System ◽  
Life Cycle ◽  
Schistosoma Mansoni ◽  
Snail Host ◽  
Complex Life Cycle ◽  
Rational Approach ◽  
Effective Control ◽  
The Social ◽  
Social And Economic Development ◽  
Basic Biology

INTRODUCTION: Schistosomiasis has been described as “one of the most devastating diseases of mankind, second only to malaria in its deleterious effects on the social and economic development of populations in many warm areas of the world.” The disease is worldwide and is probably spreading faster and becoming more intense than the overall research efforts designed to provide the basis for countering it. Moreover, there are indications that the development of water resources and the demands for increasing cultivation and food in developing countries may prevent adequate control of the disease and thus the number of infections are increasing.Our knowledge of the basic biology of the parasites causing the disease is far from adequate. Such knowledge is essential if we are to develop a rational approach to the effective control of human schistosomiasis. The miracidium is the first infective stage in the complex life cycle of schistosomes. The future of the entire life cycle depends on the capacity and ability of this organism to locate and enter a suitable snail host for further development, Little is known about the nervous system of the miracidium of Schistosoma mansoni and of other trematodes. Studies indicate that miracidia contain a well developed and complex nervous system that may aid the larvae in locating and entering a susceptible snail host (Wilson, 1970; Brooker, 1972; Chernin, 1974; Pan, 1980; Mehlhorn, 1988; and Jones, 1987-1988).

A freeze-fracture-etched study of the physarum polycephalum plasma membrane during early formation of the macroplasmodial stage

1993 ◽  
Vol 51 ◽  
pp. 346-347
Author(s):  
Randolph W. Taylor ◽  
Henrie Treadwell
Keyword(s):  
Plasma Membrane ◽  
Life Cycle ◽  
Growth Phase ◽  
Filter Paper ◽  
Physarum Polycephalum ◽  
Freeze Fracture ◽  
Petri Dish ◽  
Wire Screen ◽  
Wide Mouth ◽  
Sterile Filter

The plasma membrane of the Slime Mold, Physarum polycephalum, process unique morphological distinctions at different stages of the life cycle. Investigations of the plasma membrane of P. polycephalum, particularly, the arrangements of the intramembranous particles has provided useful information concerning possible changes occurring in higher organisms. In this report Freeze-fracture-etched techniques were used to investigate 3 hours post-fusion of the macroplasmodia stage of the P. polycephalum plasma membrane.Microplasmodia of Physarum polycephalum (M3C), axenically maintained, were collected in mid-expotential growth phase by centrifugation. Aliquots of microplasmodia were spread in 3 cm circles with a wide mouth pipette onto sterile filter paper which was supported on a wire screen contained in a petri dish. The cells were starved for 2 hrs at 24°C. After starvation, the cells were feed semidefined medium supplemented with hemin and incubated at 24°C. Three hours after incubation, samples were collected randomly from the petri plates, placed in plancettes and frozen with a propane-nitrogen jet freezer.

A Spreadsheet Life Cycle Cost Model for System Modernization Studies

1994 ◽  
Vol 11 (1) ◽  
pp. 47-56
Author(s):  
Virginia C. Day ◽  
Zachary F. Lansdowne ◽  
Richard A Moynihan ◽  
John A. Vitkevich
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Cost Model
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